There are many array functions in PHP:
- strtolower()
- strtoupper()
- ucfirst()
- lcfirst()
- ucwords()
- strrev()
- strlen()
In a PHP interview, when asked about PHP string functions, you can showcase your understanding of common string manipulation functions available in PHP. Here are some commonly used PHP string functions along with brief explanations:
- strlen($string):
- Returns the length of the string.
- strtolower($string):
- Converts the string to lowercase.
- strtoupper($string):
- Converts the string to uppercase.
- ucfirst($string):
- Converts the first character of the string to uppercase.
- ucwords($string):
- Converts the first character of each word in the string to uppercase.
- str_replace($search, $replace, $string):
- Replaces all occurrences of $search in $string with $replace.
- strpos($string, $substring):
- Returns the position of the first occurrence of $substring in $string. Returns false if $substring is not found.
- substr($string, $start, $length):
- Returns a portion of $string starting from $start and with a length of $length.
- trim($string):
- Removes whitespace or other predefined characters from the beginning and end of the string.
- explode($delimiter, $string):
- Splits $string into an array of substrings using $delimiter.
- implode($glue, $array):
- Joins the elements of $array into a single string with $glue between each element.
- strlen($string):
- Returns the length of the string.
- strrev($string):
- Reverses the characters in the string.
- substr_replace($string, $replacement, $start, $length):
- Replaces a portion of $string specified by $start and $length with $replacement.
- preg_match($pattern, $subject, $matches):
- Performs a regular expression match. If matches are found, they are stored in $matches.
These are just some of the commonly used PHP string functions. Demonstrating your understanding of how and when to use these functions effectively can showcase your proficiency in PHP string manipulation.